{"id":4979,"date":"2026-06-24T19:15:41","date_gmt":"2026-06-24T19:15:41","guid":{"rendered":"https:\/\/www.copahost.com\/blog\/?p=4979"},"modified":"2026-06-25T11:01:26","modified_gmt":"2026-06-25T11:01:26","slug":"502-bad-gateway-nginx","status":"publish","type":"post","link":"https:\/\/www.copahost.com\/blog\/502-bad-gateway-nginx\/","title":{"rendered":"502 Bad Gateway Nginx: What It Means and How to Fix It"},"content":{"rendered":"\n

A 502 Bad Gateway error in Nginx means that Nginx \u2014 acting as a gateway or reverse proxy \u2014 sent a request to an upstream server (like PHP-FPM or an application server) and got back an invalid response, or couldn’t connect to it at all. It’s almost always a server-side problem, not something wrong with your computer. The most common cause is a backend service that has stopped, crashed, or run out of resources \u2014 and it’s usually fixable in minutes.<\/strong><\/p>\n\n\n\n

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The 502 Bad Gateway is one of the most common \u2014 and most confusing \u2014 errors on the web, because the message tells you that<\/em> something failed but not what<\/em>. If you’re a visitor, it means the site you’re trying to reach is having a server problem. If you’re the site owner, it means Nginx couldn’t get a valid response from whatever runs behind it. This guide covers both sides: what you can do as a visitor, and how to actually diagnose and fix it as the person running the site.<\/p>\n\n\n\n

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